US20070261393A1 - Multi-Cylinder Internal Combustion Engine - Google Patents
Multi-Cylinder Internal Combustion Engine Download PDFInfo
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- US20070261393A1 US20070261393A1 US11/744,366 US74436607A US2007261393A1 US 20070261393 A1 US20070261393 A1 US 20070261393A1 US 74436607 A US74436607 A US 74436607A US 2007261393 A1 US2007261393 A1 US 2007261393A1
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- exhaust gas
- gas manifold
- catalytic converter
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- internal combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/001—Engines characterised by provision of pumps driven at least for part of the time by exhaust using exhaust drives arranged in parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/007—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in parallel, e.g. at least one pump supplying alternatively
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/107—More than one exhaust manifold or exhaust collector
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/40—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a hydrolysis catalyst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2250/00—Combinations of different methods of purification
- F01N2250/12—Combinations of different methods of purification absorption or adsorption, and catalytic conversion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a multi-cylinder internal combustion engine, especially for a commercial vehicle
- FIGS. 2A and 2C of which disclose a multi-cylinder internal combustion engine according to which the exhaust gas outlets of a portion of the cylinders communicate with a first exhaust gas manifold section, and the exhaust gas outlets of the other portion of the cylinders communicate with a second exhaust gas manifold section, whereby a catalytic converter is disposed in each of the exhaust gas manifold sections.
- DE 101 23 359 A1 discloses in FIG.
- a hydrolysis catalytic converter and at least one oxidation catalytic converter, can have flow through them in parallel in the muffler.
- a reduction agent is metered into the inlet region of the hydrolysis catalytic converters with ammonia being produced by the reaction agent
- the oxidation catalytic converter serves for the conversion of NO into NO 2 .
- FIG. 1 shows, as a multi-cylinder internal combustion engine, a six-cylinder in-line engine pursuant to a first exemplary embodiment of an exhaust gas manifold and catalytic converter arrangement
- FIG. 2 shows, as a multi-cylinder internal combustion engine, an 8-cylinder V engine pursuant to a second exemplary embodiment of an inventive exhaust gas manifold and catalytic converter arrangement.
- each of these catalytic converters is always acted upon by a defined exhaust gas stream, Due to their arrangement separate from one another, the functionalities of the two catalytic converters do not mutually interfere with one another, but rather are fully effective, In other words, a defined exhaust gas stream flows through the oxidation catalytic converter, in which a defined quantity of the NO is converted into NO 2 .
- an internal combustion engine is designated by the reference numeral 1 and serves, for example, as the drive source of a vehicle.
- this internal combustion engine 1 is a 6-cylinder in-line engine, the cylinders of which are designated as C 1 , C 2 , C 3 , C 4 , C 5 and C 6 .
- the internal combustion engine 1 is formed by an 8-cylinder V engine, the cylinders of which are designated as C 1 ′, C 2 ′, C 3 ′, C 4 ′, C 5 ′, C 6 ′, C 7 ′ and C 8 ′, and the two banks or rows of cylinders of which are designated as 1 a, 1 b.
- the reference numeral 5 designates a delivery or charge air line, from which the cylinders of the internal combustion engine 1 are supplied with combustion air or charge air via inlets 6 .
- a catalyzer or catalytic converter 7 or 8 respectively is disposed in each of the two exhaust gas manifold sections 3 , 4 , Downstream of these catalytic converters 7 , 8 , the two exhaust gas manifold sections 3 , 4 flow or discharge into a then common main exhaust gas line or manifold 9 , in which is disposed at least one further catalytic converter 10 ,
- the catalytic converter 7 that is disposed in the first exhaust gas manifold section 3 is formed by an oxidation catalytic converter via which the nitric oxide (NO) contained in the exhaust gas that flows through is converted into nitrogen dioxide (NO 2 ).
- the catalytic converter 8 that is disposed in the second exhaust gas manifold section 4 is formed by a hydrolysis catalytic converter., and upstream of the hydrolysis catalytic converter 8 a reduction agent can be introduced into the second exhaust gas manifold section 4 , and in particular via a nozzle or jet 11 to which the required quantity of reduction agent is supplied from a supply tank 12 via a metering device 13 . Ammonia can be produced from this reduction agent with the aid of the hydrolysis converter 8 .
- each of the exhaust gas manifold sections 3 ; 4 is directed, upstream of the respective catalytic converter 7 , 8 , through the turbine 16 of a turbo-charger 17 , by means of the compressor 18 of which the charge air line 5 can be supplied with charge air.
- these catalytic converters 10 , 10 a, 10 b, 10 c are successively disposed in series in the main exhaust gas manifold 9 .
- a muffler 19 is provided in the main exhaust gas manifold 9 , wherein the catalytic converter or converters 10 , 10 a, 10 b, 10 c are installed in the muffler 19 .
- a tubular piece 9 ′ of the main exhaust gas manifold 9 is part of this mixing zone, and extends far into the interior of the muffler 19 , and opens out into a downstream intake chamber 21 , which in the cylindrical muffler 19 is separated from a forward discharge chamber 23 by a wall 22 , Catalytic converter modules 10 ′, through which flow can occur in parallel, are fixed in position in the muffler 19 by the wall 22 , which is not permeable to gas, and a gas-permeable support wall 24 .
- Each of these catalytic converter modules 10 ′ in its own housing, is provided with an SCR catalytic converter 10 , and downstream thereof an ammonia suppression catalytic converter 10 a, From the discharge chamber 23 , a final stage pipe or conduit 9 ′. leads out of the muffler 19 .
- a nitrogen dioxide (NO 2 ) suppression catalytic converter 10 c is installed in the final stage conduit 9 ′′, and a particle oxidation catalytic converter 10 b can also possibly be installed.
Abstract
Description
- The instant application should be granted the priority date of May 5, 2006 the filing date of the corresponding Austrian patent application A 774/2006.
- The present invention relates to a multi-cylinder internal combustion engine, especially for a commercial vehicle
- The present application proceeds from DE 103 22 963 A1,
FIGS. 2A and 2C of which disclose a multi-cylinder internal combustion engine according to which the exhaust gas outlets of a portion of the cylinders communicate with a first exhaust gas manifold section, and the exhaust gas outlets of the other portion of the cylinders communicate with a second exhaust gas manifold section, whereby a catalytic converter is disposed in each of the exhaust gas manifold sections. However, this document provides no discussion regarding the type of catalytic converters that are disposed in the individual exhaust gas manifold sections. DE 101 23 359 A1 discloses inFIG. 21 and the associated text the provision of a muffler in an exhaust gas manifold, whereby a hydrolysis catalytic converter, and at least one oxidation catalytic converter, can have flow through them in parallel in the muffler. A reduction agent is metered into the inlet region of the hydrolysis catalytic converters with ammonia being produced by the reaction agent The oxidation catalytic converter serves for the conversion of NO into NO2. This type of parallel flow through the two catalytic converters, proceeding from a common exhaust gas intake chamber in the muffler, can lead to undesired non-uniform flow components, which can effect either an NO2 production that is too high, or a non-complete conversion of the reduction agent, accompanied by harmful separation products such as isocyanic acid or solid cyanuric acid particles. - It is therefore an object of the present application to associate an exhaust gas post treatment device with an internal combustion engine of the aforementioned general type, according to which, due to the selection and arrangement of the catalytic converters, the problems that can occur with the parallel arrangement of the catalytic converters in the muffler of DE 101 23 359 A1 are eliminated.
- This object, and other objects and advantages of the present invention; will appear more clearly from the following specification in conjunction with the accompanying schematic drawings, in which;
-
FIG. 1 shows, as a multi-cylinder internal combustion engine, a six-cylinder in-line engine pursuant to a first exemplary embodiment of an exhaust gas manifold and catalytic converter arrangement; and -
FIG. 2 shows, as a multi-cylinder internal combustion engine, an 8-cylinder V engine pursuant to a second exemplary embodiment of an inventive exhaust gas manifold and catalytic converter arrangement. - The multi-cylinder internal combustion engine of the present application comprises an oxidation catalytic converter disposed in a first exhaust gas manifold section, wherein nitric oxide contained in the exhaust gas that flows through is adapted to be converted by the oxidation catalytic converter into nitrogen dioxide; a hydrolysis catalytic converter disposed in a second exhaust gas manifold section, wherein downstream of the oxidation and hydrolysis catalytic converters, the first and second exhaust gas manifold sections discharge into a common main exhaust gas manifold, at least one further catalytic converter disposed in the main exhaust gas manifold; and means for introducing a reduction agent into the second exhaust gas manifold section upstream of the hydrolysis catalytic converter, wherein ammonia is adapted to be produced from the reduction agent via the hydrolysis catalytic converter.
- As a result of the inventive arrangement of the oxidation catalytic converter and of the hydrolysis catalytic converter in its own respective exhaust gas manifold section, each of these catalytic converters is always acted upon by a defined exhaust gas stream, Due to their arrangement separate from one another, the functionalities of the two catalytic converters do not mutually interfere with one another, but rather are fully effective, In other words, a defined exhaust gas stream flows through the oxidation catalytic converter, in which a defined quantity of the NO is converted into NO2. Associated with the hydrolysis catalytic converter is a metering-in stretch defined by the pipe or conduit of the exhaust gas manifold section for the reduction agent Downstream of the catalytic converters, the two at that point still different gas streams are joined together, are subsequently thoroughly mixed in the main exhaust gas manifold in an adequately long mixing zone, and are then conveyed through the SCR catalytic converter or converters, as well as possibly through further catalytic converters.
- Further specific features of the present invention will be described in detail subsequently.
- Referring now to the drawings in detail, in the figures an internal combustion engine is designated by the reference numeral 1 and serves, for example, as the drive source of a vehicle. In
FIG. 1 , this internal combustion engine 1 is a 6-cylinder in-line engine, the cylinders of which are designated as C1, C2, C3, C4, C5 and C6. InFIG. 2 , the internal combustion engine 1 is formed by an 8-cylinder V engine, the cylinders of which are designated as C1′, C2′, C3′, C4′, C5′, C6′, C7′ and C8′, and the two banks or rows of cylinders of which are designated as 1 a, 1 b. The exhaust gas outlets of the cylinders are designated by the reference numeral 2. With each internal combustion engine 1, the exhaust gas outlets 2 of a portion of the cylinders (C4, C5, C6 inFIG. 1 ; C1′, C2′, C3′, C4′ inFIG. 2 ) are connected to or communicate with a first exhaust gas manifold branch or section 3, and the exhaust gas outlets 2 of the remaining cylinders (C1, C2, C3 inFIG. 1 , C5′, C6′, C7′, C8′ inFIG. 2 ) are connected to or communicate with a second exhaust gas manifold branch or section 4. The reference numeral 5 designates a delivery or charge air line, from which the cylinders of the internal combustion engine 1 are supplied with combustion air or charge air via inlets 6. A catalyzer orcatalytic converter 7 or 8 respectively is disposed in each of the two exhaust gas manifold sections 3, 4, Downstream of thesecatalytic converters 7, 8, the two exhaust gas manifold sections 3,4 flow or discharge into a then common main exhaust gas line or manifold 9, in which is disposed at least one furthercatalytic converter 10, - Pursuant to the present application the catalytic converter 7 that is disposed in the first exhaust gas manifold section 3 is formed by an oxidation catalytic converter via which the nitric oxide (NO) contained in the exhaust gas that flows through is converted into nitrogen dioxide (NO2). Furthermore, the
catalytic converter 8 that is disposed in the second exhaust gas manifold section 4 is formed by a hydrolysis catalytic converter., and upstream of the hydrolysis catalytic converter 8 a reduction agent can be introduced into the second exhaust gas manifold section 4, and in particular via a nozzle orjet 11 to which the required quantity of reduction agent is supplied from asupply tank 12 via ametering device 13. Ammonia can be produced from this reduction agent with the aid of thehydrolysis converter 8. - If the reduction agent is an aqueous urea solution, a flow mixer 14, and if desired also an evaporator or a
heating device 15, can be disposed upstream of the hydrolysiscatalytic converter 8. The flow mixer 14 serves for a thorough mixing of the metered-in reduction agent with the exhaust gas, as well as for a homogenization of the distribution of this mixture over the entire entry cross-section of the hydrolysiscatalytic converter 8. The evaporator orheating device 15 serves to accelerate the evaporation of the metered-in reduction agent. - With the V engine of
FIG. 2 , each of the exhaust gas manifold sections 3; 4 is directed, upstream of the respectivecatalytic converter 7, 8, through theturbine 16 of a turbo-charger 17, by means of thecompressor 18 of which the charge air line 5 can be supplied with charge air. - The at least one further
catalytic converter 10 in the main exhaust gas manifold 9 comprises one or more SCR(Selective Catalytic Reduction)-type catalytic converter or converters, for example ammonia (NH3) suppression oxidation catalytic converter or converters 10 a, particle oxidation catalytic converter or converters 10 b, and nitrogen dioxide (NO2) suppression catalytic converter orconverters 10 c. - In the embodiment illustrated in
FIG. 1 , thesecatalytic converters FIG. 2 a muffler 19 is provided in the main exhaust gas manifold 9, wherein the catalytic converter orconverters muffler 19. - Each portion of the main exhaust gas manifold 9 between the
junction 20 of the two exhaust gas manifold sections 3, 4 and the inlet location into the (first one of the) catalytic converter orconverters 10 forms an adequately long mixing zone for the two different gas streams that are introduced into the main exhaust gas manifold 9 from the exhaust gas manifold sections 3 4. In the embodiment ofFIG. 2 , a tubular piece 9′ of the main exhaust gas manifold 9 is part of this mixing zone, and extends far into the interior of themuffler 19, and opens out into adownstream intake chamber 21, which in thecylindrical muffler 19 is separated from aforward discharge chamber 23 by awall 22,Catalytic converter modules 10′, through which flow can occur in parallel, are fixed in position in themuffler 19 by thewall 22, which is not permeable to gas, and a gas-permeable support wall 24. Each of thesecatalytic converter modules 10′, in its own housing, is provided with an SCRcatalytic converter 10, and downstream thereof an ammonia suppression catalytic converter 10 a, From thedischarge chamber 23, a final stage pipe or conduit 9′. leads out of themuffler 19. In the illustrated embodiment, a nitrogen dioxide (NO2) suppressioncatalytic converter 10 c is installed in the final stage conduit 9″, and a particle oxidation catalytic converter 10 b can also possibly be installed. - The specification incorporates by reference the disclosure of Austrian priority document A774/2006 filed May 5, 2006.
- The present invention is, of course, in no way restricted to the specific disclosure of the specification and drawings, but also encompasses any modifications within the scope of the appended claims.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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AT0077406A AT503125B1 (en) | 2006-05-05 | 2006-05-05 | Multi-cylinder internal combustion engine mounted in commercial vehicle, has oxidation and hydrolysis catalytic converters that are placed in different exhaust gas manifold sections |
ATA774/2006 | 2006-05-05 |
Publications (2)
Publication Number | Publication Date |
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US20070261393A1 true US20070261393A1 (en) | 2007-11-15 |
US8151561B2 US8151561B2 (en) | 2012-04-10 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/744,366 Active 2029-07-10 US8151561B2 (en) | 2006-05-05 | 2007-05-04 | Multi-cylinder internal combustion engine |
Country Status (4)
Country | Link |
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US (1) | US8151561B2 (en) |
EP (1) | EP1852582B1 (en) |
AT (1) | AT503125B1 (en) |
DE (1) | DE502007000022D1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20110162358A1 (en) * | 2008-07-30 | 2011-07-07 | Emitec Gesellschaft Fur Emissionstechnologie Mbh | Exhaust gas purification system for diesel engines of utility motor vehicles |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102008016177A1 (en) | 2008-03-28 | 2009-10-08 | Süd-Chemie AG | Harnstoffhydrolysekatalysator |
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Also Published As
Publication number | Publication date |
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EP1852582B1 (en) | 2008-06-18 |
AT503125B1 (en) | 2007-08-15 |
AT503125A4 (en) | 2007-08-15 |
EP1852582A1 (en) | 2007-11-07 |
DE502007000022D1 (en) | 2008-07-31 |
US8151561B2 (en) | 2012-04-10 |
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